论文标题
拓扑金属scinau $ _2 $缺乏超导性
Absence of superconductivity in topological metal ScInAu$_2$
论文作者
论文摘要
先前据报道，Heusler化合物Scinau $ _2 $具有超导状态，临界温度为3.0K。最近的高吞吐量计算还预测，该材料具有与Beta-PDBI $ _2 $相似的拓扑非琐事结构。为了探索超导和拓扑性能之间的相互作用，对多晶型scinau $ _2 $进行了电阻，磁化和X射线衍射测量。数据表明，高质量的多晶样品缺乏尚未退火的超导过渡的样品。这些结果表明较早报道的超导性是非intrinsic的。探索了Au-In-Sc三元相空间（SCAU $ _2 $，SCIN $ _3 $和SCINAU $ _2 $）中的几种化合物，以试图识别负责非内部超导性的二级阶段。结果表明，元素中的元素负责Scinau $ _2 $中报告的超导性。
The Heusler compound ScInAu$_2$ was previously reported to have a superconducting ground state with a critical temperature of 3.0 K. Recent high throughput calculations have also predicted that the material harbors a topologically non-trivial band structure similar to that reported for beta-PdBi$_2$. In an effort to explore the interplay between the superconducting and topological properties properties, electrical resistance, magnetization, and x-ray diffraction measurements were performed on polycrystalline ScInAu$_2$. The data reveal that high-quality polycrystalline samples lack the super-conducting transition present samples that have not been annealed. These results indicate the earlier reported superconductivity is non-intrinsic. Several compounds in the Au-In-Sc ternary phase space (ScAu$_2$, ScIn$_3$, and ScInAu$_2$) were explored in an attempt to identify the secondary phase responsible for the non-intrinsic superconductivity. The results suggest that elemental In is responsible for the reported superconductivity in ScInAu$_2$.
